Safety lock



FIG. 1 is a top, front and right side perspective view of a safety lockshowing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof, the right side being amirror image;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines illustrate portions of the safety lock that form nopart of the claimed design.

CLAIM The ornamental design for a safety lock, as shown and described.